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Arduino Uno - R3

Description: This is the new Arduino Uno R3. In addition to all the features of the previous board, the Uno now uses an ATmega16U2 instead of the 8U2 found on the Uno (or the FTDI found on previous generations). This allows for faster transfer rates and more memory. No drivers needed for Linux or Mac (inf file for Windows is needed and included in the Arduino IDE), and the ability to have the Uno show up as a keyboard, mouse, joystick, etc.

The Uno R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other is a not connected and is reserved for future purposes. The Uno R3 works with all existing shields but can adapt to new shields which use these additional pins.

Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux).

Note: The Arduino Uno R3 requires the Arduino 1.0 drivers folder in order to install properly on some computers. We have tested and confirmed that the R3 can be programmed in older versions of the IDE. However, the first time using the R3 on a new computer, you will need to have Arduino 1.0 installed on that machine. If you are interested in reading more about the changes to the IDE, check out the official Arduino 1.0 Release notes!

Not sure which Arduino or Arduino-compatible board is right for you? Check out our Arduino Buying Guide!

Question: the picture shows the board having a removable DIP package, not a SMD package like your RedBoard has. If I purchase this board, will I be guaranteed to receive the DIP package model and not the SMD package? Reason I ask is that I recently purchased an UNO from Maker’s Shed that showed a DIP, and wound up getting a “special edition” SMD board, not what I wanted (though I’ll take, can’t have too many Arduino boards… :) ). But I’m specifically wanting a DIP package board, not an SMD package board. Thanks!

How can I hook up a transmitter or receiver to this? I’m looking for the receiver to then control one DC motor and a servo motor (making a RC car). Does anyone know a helpful thread, page or comment that I can use to educate myself on this type of stuff?

Hi! Yes, this is the Arduino Uno R3 board, so it comes with the Atmega328 microcontroller. Email us at techsupport @ sparkfun.com if you have anymore questions! Our Arduino Buying Guide has a lot of helpful information on it too. :)

hello greeting acordial receives from Venezuela, am currently working on a project for bafricacion of portesis leg from the mechanical to the electronic part of,,,, want to try this system for the prototype, and my serious need servo control motors, I wonder if I can offer something complete for this and its accessory, thank you very much

Please note that purchasing this board does not support Arduino.cc, the company that designs the Arduino and maintains the software. All purchases of this board support Arduino SRL which has stopped making royalty payments to the original Arduino project (see https://www.sparkfun.com/news/1791).

SparkFun currently pays royalties on the official Arduino boards we make, this includes the Pro, Pro Minis, Fio, Lilypad, and Lilypad USB. We also have quite a few boards we make that are not official Arduino boards and therefor do not have royalties associated with them like the Pro Micro, Fio V3, SamD21 boards, Qduino board, and the Uno compatible Redboard (in some cases we offered to pay royalties and the offer was declined). Definitely check out the article listed in the comment above for more information.

The added pins are a pretty huge change - Future shields which use these pins won’t be compatible with existing Arduinos. The male pins on the shield above ‘reset’ (which is currently on a 6-pin header) would interfere with the bulk power supply caps.

Reset button moved from center of board to corner near USB connector. This is great; makes it much easier to access with a shield on.

Larger heatsinking copper area for the LM117 regulator

Uses an Atmega16U2 instead of the Atmega8U2 on the previous version. Opens up more possibilities for USB apps!

According to the images, untented vias (or at least the annular ring is uncovered) on the top side, making it slightly easier to solder wires to the PCB or short something out.

An unknown component near the ICSP header - I’m guessing a diode - on the reset line? The schematic doesn’t show it, there’s no reference designator, and the “Eagle Files” .zip file is empty/corrupted (144 bytes means it’s really compressed).

Which reminds me: Your “Eagle files” .zip file is corrupted.

Also, I couldn’t get schematic diffs because your previous version pages don’t host the documentation, they point to the product pages on Arduino.cc, which have been updated. Could you find a little space on the Sparkfun servers to host those old revs?

I doubt it. If they did, everyone would clamor for the ATmega32U2 as well as the TQFP version. Sparkfun is a vendor of hard-to-find components to low-volume hobbyists, not an electronics distributor. If you want the ATmega16U2, use a distributor like Digikey or Mouser; it looks like several places have both the ATmega8/16/32U2 in stock in both the TQFP and VQFN packages (you want the latter for the Arduinos). They’re about $4 in singles.

Remember, you’ll need an intact Arduino or ICSP programmer to flash the Arduino code into the U2.

We do ship to Peru. Shipping depends a lot on the method you choose as well as you exact address. The best way to determine shipping is to add the item to your cart and try to check out. The first part of the checkout procedure gives you a list of all shipping options as well as their prices. Note: This does not include any import fees that your country may charge.

The Arduino Uno R3 is a great little board. The only problem is that it doesn’t have enough memory for really big programs with a lot of variables. Are there any ways around the memory problem, other than using less variables?

There is always just being a more efficient programmer (better use of functions, pointers, variable, etc.). You can also be creative and use an SD card for things like data, this works well if you are doing things like playing music where half you code is actually keeping track of your notes. You can also split your code onto 2 boards (a lot of people do this with the Pro Minis) and have one do data retrieval and the other number crunching or something. If you still don’t have enough memory look into the Arduino Mega if you want to stay with Arduino, Teensy boards if you kind of want to stay with Arduino, or pretty much any ARM board if you are up for something different.

Nice, but this could be cheaper. SainSmart has a UNO R3 compatible board, with extra headers for all I/O, PLUS 3v3V/5V I/O switch, for almost half the price: USD 13.99. So it’s possible (esp. since you mention you make purchases of 10k).

Except this isn’t an Uno R3 compatible board. It is the official Uno R3 meaning 1. We don’t really determine the prices 2. This product officially supports the Arduino environment and IDE. Everyone makes clones, and can often make them cheaper (especially if they are in China and/or do not support our friends at Arduino). We even make our own clone, but you will always pay more for the original than for a clone.

Is that a firewire port on the Arduino Uno - R3 and if so dose it come with a Firewire to USB cable? Would this be the best board for a 5x5x5 LED cud, if not what is the best arduino board for this project?

Great Board and have it working brilliantly with bluetooth shield. Question, what is your recommendation for rechargeable battery power? The Arduino needs 7-12 volts so was thinking 2 x LiPo @ 3.7V each and Sparkfun LiPo USB charger???

,i have an arduino + lcd keypad and i want to put a function in a case menu but i dont know how .th function must count how many times i push a button in a period of time.i use pin 2 and 3 for buton.if somebody can help me with the cod.

I don’t know!
I have nearly worn out my DIP socket from using the UNO to program 328s for embedded and from removing the 328 to use UNO as a serial programmer.
try that with the SMD. ;)
On my original, I will replace the DIP socket with a ZIF socket.
Shields won’t fit, but I have other R3s.

I’d like to see a new Arduino with a built in compiler. Add a switch that makes show up as mass storage device when plugged in, with the code the as the only .txt file. Then you could reprogram it from any computer without any extra software!

Hi! This does not come with the 5V power supply wall adaptor. I suggest getting the Wall Adapter Power Supply - 9VDC 650mA in our “Recommended products” list below. Wanted to add: You can have an external power supply of 5V, but if you have an external power supply less 7V the 5V pin may supply less than five volts as noted on the Arduino product page. :D

Hi!
I’m just bought an UNO R3 and start playing with some MCU applications. At first, I want to start with creating some shields which would be handy. So, I begin my work with the Eagle files here i.e. deleting all the components and leaving the connectors intact
However, the Eagle schematic and board files here are not consistent by default. Many components are from smartPrj.lib something that can’t be referenced to.
How should I fix this consistency error? or where to find that smartPrj.lib?
I’ve done some Googling but none works. Thanks!

Old comment is old, but I landed here from another more recent comment, so just dropping a solution here as well:

The easiest way to resolve [the consistency error] is to open the .brd file in a text editor (notepad will do), look for the text “1x10@1” and replace it with “1x10”. There should be two occurrences, replace both. The files should then load without a consistency error.

I visited the manufacturer’s site, and find that all the required software and documentation for the Uno are scattered around on various web pages.

Is there perhaps a single place where I can download everything at once? In particular I would like an off-line source of documentation, rather than having to access it a page at a time on the internet.

The software for interfacing with the Arduino is available here and includes several great examples in the download package to get you started. If you are looking for a general all-in-one getting started guide, you may want to check out the download for our SparkFun Inventors Kit guidebook, or look at a book like Getting Started with Arduino.

trying to use the example code for joystickmouse and the joystick shield but it is saying that Mouse is only supported on the leonardo can someone help me and yes i am using the r3 board please reply to this so i get a notification thanks

You should really check with Microelectronica for support of their boards, but from looking at the site, it looks like it depends on the individual click board. The main thing you need to keep your eyes open for is that voltage levels match up, and checking pin outs if you want to be able to plug them together. Otherwise you may just need to use jumper wires.

Having Major Trouble. Cannot install the drivers to download programs on a Win8 64bit computer. It finds them but refuses to install because they are not signed. Got the latest from ftdichip and will still not install even though the site says they are signed. I even downloaded their drivers as an *.exe program. http://www.ftdichip.com/Drivers/VCP.htm

Son is fading fast. “I thought this was supposed to be fun dad.”
Any guidance greatly appreciated…..

From that link, it is indicated that Arduino started using their own USB vendor ID (VID), so the device will not be identified as nor work with anything related to FTDI.

64-bit Windows has been a lot more picky about unsigned USB drivers than prior versions. While I haven’t done anything with Arduino yet, there are a few things I can suggest.

1) Get Windows to disable device driver signature enforcement. Windows 8 apparently does this differently than before – it used to be that hitting F8 on boot would get to a menu that would allow this, but apparently now they have brought that control up into the OS. Have a look here:

Historically, when you disable the driver signature enforcement, Windows re-enables it on the next reboot. Not a great or permanent solution, but if you’re just trying to get something done, it may be an option.

2) Try to coerce Windows into loading the driver. If you go into the device manager and tell it to load the driver, it may force you to browse to the location of the .inf file with the Arduino VID/PID (probably provided with whatever you installed for the kit). It may then allow you to use this if you suffer through enough warning dialogs first. This may work better under 32-bit than 64-bit (where I believe the enforcement is more severe). This might need to be done in conjunction with option #1 above.

3) Windows is the only OS that requires a special driver file to use the new board (notwithstanding reports of OSX Mountain Lion above – not sure about that). You might be able to get an Ubuntu Linux on a USB flash drive that allows you to use the same tools without installing anything permanently on your PC. However, that is likely to have its own learning curve.

4) Buy a USB Vendor ID for yourself ($5K), get the device driver professionally tested (~$400 just for Windows 8 64-bit based on my experience) and signed ($250). This is what Microsoft thinks you should do.

Hi I would like to know if it is possible to connect a Proximity Sensor(Sharp GP2Y0A21YK IR or Maxbotix LV-EZ0) and a Arduino Wi-Fi Shield(DEV-11287) both in a Arduino R3 ?
The sensor in the Arduino R3 and also the Wifi shield.

Ideally, you want to keep your power supply between 7-12v to prevent any damage to the board. The max rating for the Uno is 20v, but again, you want to stay away from this. Voltage regulation is going to be the key otherwise.

Oh, that’s a thought… could you export a DXF? I need to incorporate all the features (board edges, mounting holes, pin locations) into a mechanical assembly. It would be nice to actually use the *.brd file, but for now, I just need mechanical features.

Export as DXF seems to have worked beautifully: http://www.filedropper.com/arduinounorev3-02-th

An Eagle BRD file is more problematic. The board export ULP is a little twitchy as it is, and of course doesn’t export package information - so v5 complains and doesn’t place any pads. exp-project-lbr.ulp generates a library that v5 refuses to load, etc.

While I’m sure there’s some other avenues one can explore there (I was hoping a quick Google search would turn up a ‘save as v5’ or an ULP for v5 to read v6’s XML files), I think that long-term you should look at an upgrade to v6 :)

One more trick for you: EAGLE 6 files are now XML format text files (a good reason for upgrading) that are quite human-readable. If for example you just need the locations of the standoffs, you can probably find the parts and coordinates fairly easily in the .brd file itself.

Also, if you’re not updating because you don’t want to affect an older paid installation, you can install the free version alongside the paid one without causing problems.

Yeah, but you’d probably want to write a proper parser for the rest :) Coordinates for package footprints are all relative to a master definition of that package, for example. Upgrading, even if it’s just grabbing the free copy, is definitely the path of least resistance.

Hi, I am new to arduino, Can any one tell me how to make Arduino Uno to communicate with Android device. I considered of having a ADK board from seeedstudio.com, since it costs more I am looking for other options. Please help out..

I’d suggest using the IOIO board for any Android related development. It is much easier to use than the ADK, i.e. you only program in one environment and the code libraries you use are based on the Arduino template of writing code: setup and loop. Check the IOIO wiki here for more info.

Thank you very much for the reply. Since we are planning to release that as a product, we are planning to develop our own board. So we cannot use any standard available boards. So we were looking for the alternatives. And found out Uno can complete the required task.

Actually there will be different sensors(fire,smoke,door,PIR) attached to Uno, and if any of them is triggered particular action is taken via the android device.

Mike’s right on this one! The naming convention probably came from the fact that this board was released in 2011. The previous version, the duemilanove (translation from Italian is 2009), was released in 2009. Why they didn’t go with undici (11) is beyond me.

Also: when I recieved mine, the top 10 pin header was shifted up by one pin, making it impossible to install a shield. Easy enough to fix, and I don’t blame QC for it: it was a very well hidden problem. The PnP that installed the headers probably just miss-alligned it when it inserted it.

I’m looking at mating one of these to a GainSpan GS1011MIE, but the documentation seems vague and I’m not sure how they’d hook together. Has anyone done it, and how did it go? Are there other (clearer) options for getting an arduino to do 802.11 wifi? (I need range and reliability but not speed). Thanks!

I’m a little confused. I had planned on using this Uno to program ATMega128 chips. in the features list and photo it shows that it has an ATMega128, but in the description above it talks about an ATMega16u2. What am I missing here? Thanks.

I’m considering buying one of these, developing software, and then prying the processor out and putting it on a (very space-constrained) circuit board. What’s putting me off is the hate-mail at http://www.sparkfun.com/products/10524 - it sounds like the chip isn’t all that stable about booting when its on its own. Also, there’s no 16MHz crystal currently available for this processor here, which makes me wonder if this chip is sort of being abandoned, because it was a troublemaker.

Can someone comment on stability and long term viability? This is a one-off project, but it has to be rock solid about booting up when power is applied. And I’m not one for patiently fussing with bootloaders and .hex files - I want to write C++ code, push a button, and see it running on the chip, 10 times out of 10. Am I better off with something else?

I demonstrated to him how I had used an Arduino Uno R3 to program a BlinkM which in turn was used in stand-alone mode to drive an analog RGB LED strip with pre-programmed color changes, but he wants to cascade his color changes down the strips, hence the requirement for individually addressable LEDs.

I don’t know if a BlinkM can be used to send cascading color changes down a digital RGB LED strip or whether an Arduino is necessary.

I’m also not sure whether an Arduino can be programmed to start color cycling the LED strips immediately on power up. He wants it to start cycling as soon as he turns it on without having to do any preliminary settings.

An arduino will start running whatever code you’ve loaded on it on powerup. If cost is a concern, i’d abandon blinkm as fast as possible and just hook up some ws2801 or lpd8806 light strips to an arduino. Both chips have well documented example arduino code.

I ordered twelve of these for our PORPOISE Robotics program in the schools and have started working with 5 of them. 3 are working fine but 2 suddenly stopped working. They don’t get recognized by the Arduino IDE. The yellow LED at 13 goes on but there is no way to upload even the blink program. The back of one of them gets very hot, and the back of the other gets medium hot. It doesn’t seem to be the IC chip because we swapped out one to test it with a good one. Anybody else having these problems? Has me very concerned. Ideas?

Can anyone tell me the transfer data rate i can expect from a well developed aplication with UNO R3?

Lets say i have a camera sending stream video to arduino, and arduino sending this data to a notebook/desktop all via usb cables or faster interfaces, even 11mbps wifi like DIY HYDROGEN.

Can I expect at least 10mbps? Or its just stupid try to connect a webcam directly to arduino, instead of directly connect it to the notebook/desktop, and the desktop aplication control the webcam via whathever input data on arduino?

Serial data rates typically top out at 115200 bps, which isn’t fast enough for video. You might be able to do more with the other interfaces, but nothing in Arduino is designed for high-bandwidth processing (starting with the difficulty of connecting your camera to the Arduino’s USB port in host-mode). You’ll likely have better results connecting the camera directly to the PC, and having the Arduino handle your low-bandwidth sensors, UI controls, etc.

Hi!! I was very excited to buy an Arduino R3 board on Sparkfun (I also bought a cellular shield SM5100). They arrived yesterday!! I followed the arduino website instructions: I downloaded the IDE software; when I plugue the arduino board on my pc (windowns vista), the green led turns on and the ambar led blinks. Untill here, it is all right but it does not work. The arduino uno port instalation returned an error “code 10”. I tried to reinstall the driver but the same error occurs. When I open IDE software, in “tool”, the option “serial port” is unable to click.
I chaged to other computer (also windows vista), changed the usb cable, I disabled my antivirus (norton), I followed the instructions of http://forums.adafruit.com/viewtopic.php?f=21&t=19931 and it does not work. I need help, plaese!! Thanks!!!

Wanted add the UNO R3 version matches with the R3 shield in awesome form. It finally does not rub the USB connector! The pins are much longer than most shields I have used in the past and it finally looks like the shields were designed to fit. The only problem I ran into was on the digital side, the extra pins are so close to the mounting hole that I was unable to use it with the size bolts that I normally use for my projects.

I have not tried my UNO R3 as an ISP for the ATtiny85, but I tried one of my R1 UNO with the recent version of the Arduino software(Windows) - 1.0. It will not compile. I am positive the library only needs a simple update, but it was easier to use an older version of the software at the time. I would think the R3 will work just fine with the required capacitor as there are no changes to the board related. Keep your copy of 22 or the short lived 23 version of the Arduino software around if you don’t want to update the library. FYI - The drivers for the R3 come with the Arduino software version 1.0.

Does this version ship with the snazzy little folded box, hacker stickers and rubber feet or is it just tossed in a antistatic bag? Also, on Addafruit it says the board comes fully assembled. Isn’t that how the Arduino Uno, has always come?

What is the purpose of the new I2C pins? According to the schematic, they are the same node as the original I2C pins. Is there a planned branch in the hardware where the A4 and A5 pins will no longer support I2C?

Also, does anyone know of any example code for the keyboard emulation using the 16U2?

New header pins? Really? Maybe if future shields are going to be incompatible, someone could just fix the header spacing so that it is the standard 0.1 inches!!! And yes, I did try the “new” header pin format, and it does not work with the old arduino; the pins do interfere with the caps on the arduino. I suppose one could just cut them off, assuming that they are not used – but why have them if they are not used!? Stupid.

My order has been placed! Woohoo! I cant wait! Come on priority mail! I have the Pololu Baby Orangutan B-328 but it isn’t really Arduino sketch friendly(pin mapping and such). Considering how I just started with programming, I think I need an Arduino board. The Baby O. is a great little board but I need some real practice with an actual Arduino, before I go jumping into an AVR Studio 4 programming environment. Thank you SparkFun.com for getting me started on the right foot.
P.S. I love the comments. I sit here for hours reading them, sometimes I read them till I fall asleep. Kinda like geeky little bed time stories. Hmm I wonder if they would work for my kids?

Some “Arduino-compatible” boards place other signals in the locations now occupied by the NC and IOREF pins, ranging from +1.8V to analog inputs. Will the release of the R3 break the compatibility of these devices (e.g. the DFRobot Romeo) with future shields?

I’d say it’s a bit early to say. I think it really depends on if the shield is going to utilize those pins. I don’t foresee many using the IOREF but depending on how things go, I think these boards might have adapt those pins if they want to keep up with the community.

Customer Reviews

4.5 out of 5

Uncertified board!

I bought this (supposedly) Original Arduino board a few weeks ago and the Arduino IDE shows me that it is not a Certified board. It works fine, but I preferred to buy from SparkFun and not Amazon because I wanted a certified one!

The Uno and other “official” Arduino boards such as the Mega, are not manufactured by the original crew. The error you are seeing is the Arduino.cc crew bringing attention to the fact that your board was made by Arduino SRL. However, at this time, Arduino.cc is not manufacturing a Uno board of their own. We suggest the Arduino Pro and Pro minis from Sparkfun as they do pay a royalty from each item sold back to the Arduino team. Additionally, the RedBoard is a great alternative is you choose to not purchase Unos

5 of 6 found this helpful:

Arduino is amazing

Bought it to use as a test mule for my new designs, and have become hooked. Seriously, this thing is more useful than duct tape and WD40. Absolutely amazing, saved some cash from the Arduino website and got a real one, not some cheap knockoff. Thanks sparkfun!

5 of 7 found this helpful:

in my mind it's fake

Sparkfun should make clear that this is an arduino.org and not arduino.cc board. I’d rather buy a clone from seeed or another company than from the guys that are basically screwing up the arduino brand.

Great, but Windows 8 makes it a nightmare.

The item itself is perfect. Great functionality and you can use it for anything. Just one warning…You will have to fight many many battles to get any functionality out of this on Windows 8. Even if you go through the ordeal to allow unsigned drivers, install drivers from different compatible technologies, you will not have consistent connectibility.
Mac works fantastic.
Any other windows, you’re set. Just be aware.

It's an arduino, but the reset on serial connect is still a problem

I bought an R3 because I had read on arduino.cc that it would not suffer the reset on serial connection problem that other boards have. That does not seem to be the case, this board still resets itself as soon as I connect over the serial interface.

Hi,
I haven’t heard of the R3 not resetting when terminal is opened. Actually from all of my use cases, I have found that it does reset. However, in doing a bit of research on this topic, I found a suggestion that may help you.
It appears that if you place a 10μF capacitor between Reset and Ground it will prevent the auto reset permanently.

Just what I expected

This product is great; it is just about what I expected. I use it in conjunction with my raspberry pi to hook up lights, buttons, motors , etc. Only complaint I have is it does not come with the USB to hook it up. It is a standard printer cable.

Great device

The best prototyping board !

I’m just starting to learn arduino and it’s already awsome !!! Very easy to power, to connect to pc aver usb, to program and load sketches…This board have a big potential to do almost everything you want, just very user friendly and a must have for DIYers, geeks or any curious guys !!! ;p

I am very impressed

ive ordered so many parts from amazon last month that arent coming for another month, and last minute i order the uno from you guys and i get it in less than a week, and it got shipped out within hours! it’s my first time ordering from you guys and i will continue to do so

0 of 1 found this helpful:

Fun new tool!

New to Arduino, and only kinda knew HTML and CSS, but figured code is code. I had this up an running super fast, and figured out how to read a few sensors and control motor speed via PWM on day one! Instantly I started to think of all the things I could do with one of these. The usb port and dc power jack make this very easy to hook up and use. I would highly recommend this board.

Open Source Awesomeness

Nice open prototyping platform for beginners just getting started with microcontrollers. The pins are labelled on the board & the side of the headers so it’s easier to see what pin you’re connecting to. I’m currently using this board to run grbl 0.9 for a tabletop CNC design from OpenBuilds & it was really simple to flash & get running. I do recommend anyone purchasing one of these also grab a few spare ATmega 328 chips (https://www.sparkfun.com/products/10524) in case you make a mistake & release the magic smoke.

Great piece of equipment

This is my first venture into electronics. The Arduino has proven to be a very enjoyable learning tool. I look forward to learn about the Arduino and add accessories to the micro controller as I continue. For novices to electronics like myself, I recommend the use of the Arduino.

Simply Amazing!

Best thing you can buy as an entry level for beginners. A lot of support and very easy to use. Cross platform IDE and very helpful forum. A very vast range of third party parts that fit perfectly.

Couldn’t buy a better product even if I wanted!

Very satisfied. If you haven’t bought one yet or you are still undecided, wait no more, just buy it. I promise you that you won’t regret it and you’ll find a lot of tutorials if you have no idea what to do with it.

Great board.

My initial attraction to the Arduino Uno R3 was that it runs with C/C++, a language I’m familiar with. So far it, and the Xbee attachments have performed flawlessly, just as the community (hobbyists/engineers) has advertised. I’m very much enjoying my first project and am already dreaming of others. I find it most satisfying to work with a quality product while having the immense support of the manufacturer and it retailers. Another very much appreciated group I turn to for help and advice are those sharing their experiences over the Internet.

Ok as long as Arduino.org

I teach a Maker class. Since most popular textbooks show Arduino Uno, I wanted to use that format.

However, I had to make sure that students dowloaded IDE from Arduino.org and not from Arduino.cc in order to match up the drivers for the Arduino SRL boards.

If Arduino.cc IDE was already installed, I needed to uninstall it from student’s computer.

Fortunately, all Sketch software ran on the IDE from both sources. Sketch files were not deleted when I uninstalled Arduino.cc IDE.

Glad Sparkfun still carries Arduino UNO but might want to document the download path better. The “Arduino.org” sticker attached to the processor chip was helpful in differentiating different boards (SRL vs. Original boards), so I left it attached.

Hi,
I’m sorry about this. The Uno and other “official” Arduino boards such as the Mega, are not manufactured by the original crew. The error you are seeing is the Arduino.cc crew bringing attention to the fact that your board was made by Arduino SRL. However, at this time, Arduino.cc is not manufacturing a Uno board of their own. We suggest the Arduino Pro and Pro minis from Sparkfun as they do pay a royalty from each item sold back to the Arduino team. Additionally, the RedBoard is a great alternative is you choose to not purchase Unos.

A known quantity!

I like the Uno - R3 because I am very familiar with its capabilities. It is a complete microprocessor platform, ready to be put to work. I often use them in non-Arduino projects. I also like the Red Board for the same reasons.

Great little board that could?

Sparkfun shipped it fast and the MCU as I call it rocks right on through it’s loop functions. I think this is were to start if you want to learn programming. Great little board that could?
Thanks, sparkfun

Easy to setup and Use

These things are great for little projects. I popped one of the Breadboard shields on it, and with one TMP36 and 3 wires (and a little programming) I was sending temperatures to my Computer through the USB cable. And I know many people have done much more complicated projects.

Very satisfied

Does the job

I’ve used Arduino Unos in the past and they have always been a solid little micro-controller for simple projects. I can’t say I’m testing the limits of the unit since I only run 20-30 lines of code at a time with my current project but it always does what you tell it to do. Only issue Ive experienced is using the Rx Tx pins while connected to the USB port of the computer can cause the PC to not recognize the board and you need to unplug and reset the board and then the PC will recognize it. All in all, great board for beginners and small projects.

works fine

It's a great microcontroller !

The pin printout on the side I needed for the longest time, and its a nice machine that treats my old computer as if it was new, and It took my sketches without stress! I am a neardy Dad and my kids like to see Arduino in action. Thank you for the Sale also!

It is fun, but working with the LCD screen is tricky

(My 2nd one), smoked the first one,trying to run 4 stepper motors on a 298d & 293d, bread board got kinda full of wires & I plugged the 12 v power into the UNO. corrupted the memory, had to download new IDE
(no problem) wonder if it is the atmega 328 on the old one??, new one works Great!!

Very Useful Variant

I didn’t notice that there was only one hardware serial port, so I ended up using a Leonardo. After many hours struggling with two new Leonardos I decided that their bootloader was faulty and flashed both using the Uno as ICSP, which worked perfectly. If one hardware serial port is not a problem for your application, the Uno is a good choice.

Very good for small projects

Currently I use the Arduino Uno in tester type designs used in testing other equipment.

I use the pulse width modulator capability to create digital to analog signals with just a few added small components.

I also use the analog to digital functions for analog signal measurement of course. I do add of course filters to those circuits. I also use it to detect a voltage off of a pot element that I use as a selector switch. The only issue I have with the A/D function is that there are just not enough bits of resolution. But then again, what do you expect from a board that only cost you $25.00. For what it gives you, it is a bargain.

The only real issue I have with the hardware is that there is no direct connection to the output of the power input barrel connector. Sure, you can pick off the power in at Pin 8 on the power connector, but then you have to deal with a diode drop and a limit on the current. I just wish “PWRIN” popped out on one of the connectors some place.

Other than that, the board design is very flexible and seems to work reliably. The Arduino Uno really shines when you add external circuits to it to drive your projects electronics. They give you Eagle Files in both schematic and layout. This makes it easy to design other hardware around your project.

Currently, I use Altium as my design package. I have though exported the layout to a DXF file and use that to put an Arduino “component” on my printed Circuit assemblies. Then I just plug the Arduino Uno onto my design.

The software design environment is easy to use and has features (such as the tabs) that can be used to organize your software and make things tidy.

The Arduino software though can be buggy at times. For example, you cannot double click on your project file and have the software compile. You need to open Arduino first, then open you project. If you don’t do this, you’ll get all kinds of weird errors.

Once you get past things like this though, the environment is easy to manipulate. There are a ton of libraries and examples to get you started on your project. Most importantly though, the development environment is free! So, again, the cost of the environment is just right.

I have enjoyed and have had a lot of fun with the design. Does it have its limits? Sure. The hardware design though is flexible and the cost to build your projects is very low.

Awesome tool

If your IO ports needs are not excessive (14 digital and 6 analog pins) and your sketch is of medium length (500 lines), the Arduino Uno R3 is perfect. Those limitations are not excessive and in many cases can be extended with simple external circuits. It also has I2C and SCI interfaces for use with many different shields.

I gave it to my colleague

My colleague needed to know the index of refraction of air to umpteen decimals. So I bought an arduino, a barometric pressure sensor, plagiarized some code from Sparkfun (THANKS!) and now he has what he needed. Made a friend along the way. What’s not to like about that.

Great Micro Controller

Amazing technology. I built my first computer IBM AT 10 megahertz . Telling you my age, the credit card size at 16 megahertz. I’m learning a lot about electronics, my background is Mechnical engineering. I highly recommend this open source and generous people supporting the Arduino uno.

Amazing

Love this small computer

This is my second Arduino Uno. The previous one came with a starter kit and I ordered a wavshield with it so it is dedicated to a specific application that I have in mind. I needed another Arduino Uno to play with so I could learn to develop other applications. This one from sparkfun was available and the note that told me to order the updated IDE was helpful. It works and I’ve been able to apply sketches from the Arduino Cookbook. I’m having fun and in geek heaven with this Arduino board.

The Uno and other “official” Arduino boards such as the Mega, are not manufactured by the original crew. The error you are seeing is the Arduino.cc crew bringing attention to the fact that your board was made by Arduino SRL. However, at this time, Arduino.cc is not manufacturing a Uno board of their own. We suggest the Arduino Pro and Pro minis from Sparkfun as they do pay a royalty from each item sold back to the Arduino team. Additionally, the RedBoard is a great alternative is you choose to not purchase Unos.

Quick and Easy little controllor

This is less powerful than a Raspberry pie, but is very simple and straight forward. The documentation and forum sites easily answer any questions that you might have when starting out. The example sketches (programs, for those who haven’t started with Arduino yet), are a great learning tool and you’ll have a sketch of your own up and running in minute or hours instead of days. My only complaint is that you are limited to the number of digital and analog pins, but then you could connect more Arduinos together as a system.

Hot glue on Arduino

After opening the box there was a 3m Bumpon strip that looked hotglued to the board is over the UNO writing and I believe one of the resistors. This is my first Arduino from Sparkfun and I’m very disappointed. Why smear hotglue all over the top of the board. I haven’t. Checked if it runs fine but to be honest I like to use clear cases and display my arduinos in projects.

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